Gauging or calibrating device for tubular films

Claim 2

In a production plant for tubular films using the blowing process in which a film of flexible tubing is cooled by air after emerging from the film-blowing head, a gauging or calibrating device comprising: a. a plurality of support rings surrounding the tubular film in its still plastic region after emerging from the blowing head, b. said support rings being arranged at wide intervals with respect to each other, and c. each said support ring comprising i. a spindle bent in a circle and ii. a heat-resistant and nonadhesive covering which can rotate on said spindle.

Claim 3

The invention as claimed in claim 1, wherein the rotatable covering of each support ring comprises a thin-walled flexible tube of heat-resistant nonadhesive material, such as silicon rubber, which is supported on the spindle of the ring by means of free-running support rollers.

Claim 4

The invention as claimed in claim 1, wherein the rotatable covering of each support ring consists of individual rollers arranged closely adjacent one another of a heat-resistant, nonadhesive material with a low coefficient of friction, such as polytetrafluoroethylene.

Claim 5

In a production plant for tubular films using the blowing process in which a film of flexible tubing is cooled by air after emerging from the film-blowing head, a gauging or calibrating device comprising: a. a plurality of support rings surrounding the tubular film in its stIll plastic region after emerging from the blowing head, b. said support rings being arranged at wide intervals with respect to each other c. each said support ring comprising i. s spindle bent in a circle and ii. a heat-resistant and nonadhesive covering which can rotate on said spindle, and d. each said support ring being divided in one place and being fastened by means of e. infinitely adjustable holding devices each on two rods.

Claim 6

In a production plant for tubular films using the blowing process in which a film of flexible tubing is cooled by air after emerging from the film-blowing head, a gauging or calibrating device comprising: a. a plurality of support rings surrounding the tubular film in its stIll plastic region after emerging from the blowing head, b. said support rings being arranged at wide intervals with respect to each other c. each said support ring comprising i. s spindle bent in a circle and ii. a heat-resistant and nonadhesive covering which can rotate on said spindle, and d. each said support ring being divided in one place and being fastened by means of e. infinitely adjustable holding devices each on two rods.

Claim 7

The invention as claimed in claim 4, wherein the rotatable covering of each support ring comprises a thin-walled flexible tube of heat-resistant nonadhesive material, such as silicon rubber, which is supported on the spindle of the ring by means of free-running support rollers.

Claim 8

The invention as claimed in claim 4, wherein the rotatable covering of each support ring consists of individual rollers arranged closely adjacent one another of a heat-resistant, nonadhesive material with a low coefficient of friction, such a polytetrafluoroethylene.

Claim 9

In a production plant for tubular films using the blowing process in which a film of flexible tubing is cooled by air after emerging from the film-blowing head, a gauging or calibrating device comprising: a. a plurality of support rings surrounding the tubular film in its still plastic region after emerging from the blowing head, b. said support rings being arranged at wide intervals with respect to each other c. each said support ring comprising i. a spindle bent in a circle and ii. a heat-resistant and nonadhesive covering which can rotate on said spindle, d. each said support ring being divided in two places, e. two pairs of holding rods, f. rearward engaging straps on two holding rods of said two pairs of holding rods, and g. a plurality of infinitely adjustable holding devices each fastening one of said support rings to said two holding rods by means of said straps.

Claim 10

In a production plant for tubular films using the blowing process in which a film of flexible tubing is cooled by air after emerging from the film-blowing head, a gauging or calibrating device comprising: a. a plurality of support rings surrounding the tubular film in its still plastic region after emerging from the blowing head, b. said support rings being arranged at wide intervals with respect to each other c. each said support ring comprising i. a spindle bent in a circle and ii. a heat-resistant and nonadhesive covering which can rotate on said spindle, d. each said support ring being divided in two places, e. two pairs of holding rods, f. rearward engaging straps on two holding rods of said two pairs of holding rods, and g. a plurality of infinitely adjustable holding devices each fastening one of said support rings to said two holding rods by means of said straps.

Claim 11

The invention as claimed in claim 7, wherein the holding rods of each pair are connected together by means of connecting members which can be adjusted in their distance from each other and are easily separable.

Claim 12

The invention as claimed in claim 7, wherein the rotatable covering of each support ring comprises a thin-walled flexible tube of heat-resistant nonadhesive material, such as silicon rubber, which is supported on the spindle of the ring by means of free-running support rollers.

Claim 13

The invention as claimed in claim 7, wherein the rotatable covering of each support ring consists of individual rollers arranged closely adjacent one another of a heat-resistant nonadhesive material with a low coefficient of friction, such as polytetrafluoroethylene.